[Bug go/60406] recover.go: test13reflect2 test failure

["ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60406

--- Comment #4 from UroÅ Bizjak <ubizjak at gmail dot com> ---
Alternatively, since __go_set_defer_retaddr always returns 0, we can prevent
split of the label by enclosing it in asm volatiles:

extern int foo (void *);
extern void bar (void);

int test_1 (void)
{
  __label__ bla1;

  if (foo (&&bla1))
    goto bla1;

  asm volatile ("");
  bar ();
 bla1:
  asm volatile ("");

  return 0;
}

test_1:
        subl    $28, %esp
        movl    $.L2, (%esp)
        call    foo
        testl   %eax, %eax
        jne     .L2
        call    bar
.L2:
        xorl    %eax, %eax
        addl    $28, %esp
        ret

'goto label' can also be substituted with 'asm goto ("" :::: label)', but I
don't think this is necessary in the above case.